From: "Michael S. Tsirkin" <mst@redhat.com>
To: David Woodhouse <dwmw2@infradead.org>
Cc: qemu-devel@nongnu.org,
Marcel Apfelbaum <marcel.apfelbaum@gmail.com>,
Paolo Bonzini <pbonzini@redhat.com>,
Richard Henderson <richard.henderson@linaro.org>,
Eduardo Habkost <eduardo@habkost.net>,
Marcelo Tosatti <mtosatti@redhat.com>,
Alex Williamson <alex.williamson@redhat.com>,
paul@xen.org
Subject: Re: [RFC] Notify IRQ sources of level interrupt ack/EOI
Date: Wed, 11 Jan 2023 11:25:05 -0500 [thread overview]
Message-ID: <20230111112425-mutt-send-email-mst@kernel.org> (raw)
In-Reply-To: <23caafffdd9546b8eeff851660015f3bfc021ed3.camel@infradead.org>
On Wed, Jan 11, 2023 at 02:41:58PM +0000, David Woodhouse wrote:
> This allows drivers to register a callback on a qemu_irq, which is
> invoked when a level-triggered IRQ is acked on the irqchip.
>
> This allows us to simulate level-triggered interrupts more efficiently,
> by resampling the state of the interrupt only when it actually matters.
I think we tried this with vfio and had to give up on this.
I don't remember the details though. Alex probably does?
next prev parent reply other threads:[~2023-01-11 16:26 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-01-11 14:41 [RFC] Notify IRQ sources of level interrupt ack/EOI David Woodhouse
2023-01-11 16:25 ` Michael S. Tsirkin [this message]
2023-01-11 16:58 ` David Woodhouse
2023-01-11 18:29 ` Alex Williamson
2023-01-11 19:08 ` David Woodhouse
2023-01-11 19:43 ` Alex Williamson
2023-01-11 19:50 ` David Woodhouse
2023-01-11 20:00 ` Alex Williamson
2023-01-11 20:10 ` David Woodhouse
2023-01-12 8:05 ` David Woodhouse
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